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38AU
AirCooledCondensingUnits
60Hz
R
WithPuron (R---410A)Refrigerant
Sizes 16---25
Installation,Start---Upand
ServiceInstructions
CONTENTS
SAFETY CONSIDERATIONS .................... 2 Compressor Oil .............................. 33
Servicing Systems on Roofs with
INSTALLATION GUIDELINES .................. 2
Synthetic Materials ........................... 33
Replacement/Retrofit — R--22 to Puron ........... 2
Liquid Line Filter Drier ....................... 34
INSTALLATION ......................
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SAFETY CONSIDERATIONS ! WARNING Improper installation, adjustment, alteration, service, PERSONAL INJURY AND ENVIRONMENTAL maintenance, or use can cause explosion, fire, electrical HAZARD shock or other conditions which may cause personal Failure to follow this warning could cause in personal injury or property damage. Consult a qualified installer, injury or death. service agency, or your distributor or branch for information or assistance. The qualified installer or Relieve pressure and recover
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Same tube sizes are capable of handling higher flowrates 5. Install a new field-supplied liquid-line filter drier at (expressed as tons of cooling capacity) with Puron the indoor coil just upstream of the TXV or fix orifice refrigerant compared to R- -22 at constant pressure drops. metering device. 1 For example, a / - -inch OD liquid line is rated at 33% 2 6. If a suction line filter drier is also to be installed, in- R higher tons with Puron than with R- -22 (at 5_F pressure stall suction line
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C10942 Standard Corner Corner Corner Corner Unit UNIT CenterofGravity Weight A B C D Height lbs. kg. lbs. kg. lbs. kg. lbs. kg. lbs. kg. X Y Z H 3 38AUZ*16 38 19 15 50 / 8 633 288 220 100 134 61 135 61 144 65.5 (MCHX) [965.2] [482.6] [381] [1279.2] 3 38AUD*16 38 19 15 50 / 8 633 288 220 100 134 61 135 61 144 65.5 (MCHX) [965.2] [482.6] [381] [1279.2] 3 38AUZ*16 38 19 17 50 / 8 731 332 237 107 172 78 135 61 186 84 (RTPF) [965.2] [482.6] [431.8] [1279.2] 3 38AUD*16 38 19 17 50 / 8 731 332 237 107
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C10943 Standard Corner Corner Corner Corner Unit UNIT CenterofGravity Weight A B C D Height lbs. kg. lbs. kg. lbs. kg. lbs. kg. lbs. kg. X Y Z H 3 38AUZ*25 38 23 17 50 / 8 978 444 360 163 188 85 147 67 283 128 [965.2] [584.2] [431.8] [1279.2] (RTPF) 3 38AUD*25 38 23 17 50 / 8 978 444 360 163 188 85 147 67 283 128 [965.2] [584.2] [431.8] [1279.2] (RTPF) LEGEND: RTPF=RoundTube/PlateFin coil Fig. 2 -- 38AU**25 Unit Dimensions 5 38AU
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Table 1A — Physical Data — 38AUZ*16-25 Units — 60 Hz English UNITSIZE38AU Z*16 Z*25 NOMINALCAPACITY (tons) 15 20 OPERATINGWEIGHTS(lb) NOVATION ™Coil(AlTube) 633 --- RoundTube/PlateFinCoil(Cu/Al) 731 900 ‡ REFRIGERANTTYPE R-410A † NOVATIONOperatingCharge,Typical(lb) 24.6 --- NOVATIONShippingCharge(lb) 12.2 --- † RTPFOperatingCharge,Typical(lb) 43.0 38.0 RTPFShippingCharge(lb) 32.0 28.0 COMPRESSOR Qty...Type 2...Scroll 2...Scroll OilCharge(oz) 60 110 CONDENSERFANS Qty...Rpm 3...1100 4...1100 1 1 M
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Table 1B — Physical Data — 38AUZ*16-25 Units — 60 Hz SI UNITSIZE38AU Z*16 Z*25 NOMINALCAPACITY (kW) 52.7 70.3 OPERATINGWEIGHT(kg) NOVATION ™Coil(AlTube) 288 --- RoundTube/PlateFinCoil(Cu/Al) 332 409 ‡ REFRIGERANTTYPE R-410A † NOVATIONOperatingCharge,Typical(kg) 11.1 --- NOVATIONShippingCharge(kg) 5.4 --- † RTPFOperatingCharge,Typical(kg) 19.5 17.2 RTPFShippingCharge(kg) 14.5 12.7 COMPRESSOR Scroll Qty...Type 2...Scroll 2...Scroll OilCharge(L) 1.7 3.2 CONDENSERFANS Qty...r/s 3...18 4...18 1 1 Mot
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Table 2A — Physical Data — 38AUD*16-25 Units — 60 Hz English UNITSIZE38AU D*16 D*25 NOMINALCAPACITY (tons) 15 20 OPERATINGWEIGHTS(lb) NOVATION ™Coil(AlTube) 633 --- RoundTube/PlateFinCoil(Cu/Al) 731 900 ‡ REFRIGERANTTYPE R-410A † NOVATIONOperatingCharge A/B,Typical(lb) 12.0/12.0 --- NOVATIONShippingChargeA/B(lb) 6.0/6.0 --- † RTPFOperatingChargeA/B,Typical(lb) 22.0/22.0 19.0/19.0 RTPFShippingChargeA/B(lb) 16.0/16.0 14.0/14.0 COMPRESSOR Qty...Type 2...Scroll 2...Scroll OilChargeA/B(oz) 60/60 110/
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Table 2B — Physical Data — 38AUD*16-25 Units — 60 Hz SI UNITSIZE38AU D*16 D*25 NOMINALCAPACITY (kW) 52.7 70.3 OPERATINGWEIGHT(kg) NOVATION ™Coil(AlTube) 288 --- RoundTube/PlateFinCoil(Cu/Al) 332 409 ‡ REFRIGERANTTYPE R-410A R-410A † NOVATIONOperatingCharge A/B,Typical(kg) 5.4/5.4 --- NOVATIONShippingChargeA/B(kg) 2.7/2.7 --- † RTPFOperatingChargeA/B,Typical(kg) 10.0/10.0 8.6/8.6 RTPFShippingChargeA/B(kg) 7.3/7.3 6.8/6.8 COMPRESSOR Qty...Type 2...Scroll 2...Scroll OilChargeA/B(L) 1.7/1.7 3.2/3.2
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1 2 3 4 5 6 7 8 9 101112131415161718 38 A U Z A 25 A 0 G 6 A 0 A 0 A 0 Model Type Packaging 38AU= Carrier Condensing Unit 0=Standard ® Puron R---410A Refrigerant 1=LTL Type of Coil Electrical Options Z = Single Circuit, A/C Scroll Compressor A=None D = Dual Circuit, A/C Scroll Compressor C = Non-Fused Disconnect Service Options Refrigerant Options A = None 0=None B = Low Ambient 1= 1 = Un-powered Convenience Outlet 2 = Powered Convenience Outlet Nominal Tonnage 16 = 15 Tons Not Used 25 = 20 Tons
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Evaluate the path and required line length for Matching 38AU Model To Evaporator Coil interconnecting refrigeration piping, including suction The Model 38AUZ is a single-circuit unit design, riser requirements (outdoor unit above indoor unit), liquid requiring one set of refrigeration piping. This model can line lift (outdoor unit below indoor unit) and hot gas be connected to an evaporator coil with one circuit or with bypass line. Relocate sections to minimize the length of two circuits (by ma
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Table 4 – Equivalent Lengths for Common Fittings (ft) Step 3 — Prepare Unit Mounting Support Slab Mount — Elbows Nominal Tube OD 90 °Std 90 °Lrad 90 °Street 45 °Std 45 °Street Provide a level concrete slab that extends a minimum of 6 3 in. (150 mm) beyond unit cabinet. Install a gravel apron in / 1.3 0.8 2.2 0.6 1 8 front of condenser coil air inlet to prevent grass and 1 / 1.4 0.9 2.3 0.7 1.1 2 foliage from obstructing airflow. 5 / 1.6 1 2.5 0.8 1.3 8 3 Step 4 — Rig and Mount the Unit / 1.8 1.2
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Enter the appropriate table to select the recommended line line tube size if necessary. If maximum available tube size sizes. cannot provide the required lift distance on this installation, relocate the outdoor unit to reduce the Model: LineSizesTable QuantityofLineSets equivalent line length or the lift requirement. 38AUZ 5 1 Suction Riser — 38AUD 6 2 A suction riser condition exists when the outdoor unit is Liquid Lift — located above the indoor (evaporator) unit and suction vapor must flow ve
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Table 6 – 38AUD 16-25 Piping Recommendations (Two-Circuit Unit) NOTE: 38AUDrequiresTWO setsof refrigeration piping R-410A EquivalentLength Ft 0-38 38-75 75-113 113-150 150-188 m 0-12 12-23 23-34 34-46 46-57 LinearLength Ft 0-25 25-50 50-75 75-100 100-125 m 0-8 8-15 15-23 23-30 30-38 Model 1 1 1 1 1 38AUD*16 Liquid Line / / / / / 2 2 2 2 2 Max Lift 25 50 75 100 125 7 1 1 1 1 Suction Line / 1 / 1 / 1 / 1 / 8 8 8 8 8 Charge ea. (lbs) Novation 11.7 13.8 15.7 17.6 19.6 RTPF 21.7 23.8 25.7 27.6 29.6 1
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38AU units include one (38AUZ) or two (38AUD) Puron-duty filter drier(s), shipped in cartons attached to the unit basepan. Remove the filter drier(s) and prepare to CKT 2 install in the liquid line(s) at the evaporator coil. Do not remove connection fitting plugs until ready to connect and CKT 1 braze the filter drier into the liquid line position. CKT 2 CKT 1 Circuit 2 Connections Circuit 1 1 Connections C10355 2 Fig. 6 -- 38AUD Service Valve Locations Plan the Circuit 1 and Circuit 2 tubing
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FLOW FLOW FLOW FLOW from the indoor unit to the outdoor unit before opening EQUALIZER LINE TXV INDOOR SENSING the liquid and suction lines at the outdoor unit. SIGHT GLASS COIL CKT BULB A LOCATION FILTER DRIER A LOCATION Install Liquid Line Solenoid Valve — TXV AIRFLOW 15 DIAMS 10 MIN It is recommended that a solenoid valve be placed in the DIAMS 8 DIAMS main liquid line (see Figs. 8 & 9) between the condensing MIN LIQUID LINE unit and the evaporator coil. Locate the solenoid valve at the SOLE
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1 The stub tube connections include / -in SAE service charging. For a cylinder without a dip tube, invert the 4 fittings with Schrader valve cores (see Fig. 10). Before cylinder (access valve on the bottom) when removing making any brazed connections to the unit service valves, liquid refrigerant. remove both Schrader valve caps and cores and save for Because Puron (R--410A) refrigerant is a blend, it is re-installation. Connect a source for nitrogen to one of strongly recommended that refrigera
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Step 7 — Complete Electrical Connections ! WARNING ! WARNING FIRE HAZARD Failure to follow this warning could cause in personal ELECTRICAL SHOCK HAZARD injury, death and/or equipment damage. Failure to follow this warning could result in personal Do not connect aluminum wire between disconnect injury or death. switch and condensing unit. Use only copper wire. Do not use gas piping as an electrical ground. Unit (See Fig. 11.) cabinet must have an uninterrupted, unbroken electrical ground to minim
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and mounted on a bracket behind the convenience outlet; Units Without Disconnect Option access is through the unit’s control box access panel. See CTB1 Fig. 13. 11 13 Convenience Outlet GFCI Disconnect per NEC Pwd-CO Fuse Switch L1 L2 L3 208/230-3-60 Pwd-CO 460-3-60 Transformer 575-3-60 Units With Disconnect Option L1 2 1 Control Box Optional Access Panel Factory Disconnect L2 4 3 Wiring Switch C10205 L3 6 5 Fig. 13 -- Convenience Outlet Location The primary leads to the convenience outlet tran
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NOTICE Convenience Outlet Utilization Maximum Continuous use : 8 Amps 24/7 50HJ542739 B C10207 Fig. 15 -- Convenience Outlet Utilization Notice Label Test the GFCI receptacle by pressing the TEST button on the face of the receptacle to trip and open the receptacle. Check for proper grounding wires and power line phasing if the GFCI receptacle does not trip as required. Press the RESET button to clear the tripped condition. C09022 Fig. 16 -- Weatherproof Cover Installation Fuse on power type: The
